Objective: This post hoc analysis investigates the effect of vortioxetine on cognitive functioning and depressive symptoms in working adults with major depressive disorder (MDD).Methods: Population data from FOCUS, a double-blind, randomized, placebo-controlled study investigating the efficacy of vortioxetine versus placebo on cognitive functioning and depression in patients with MDD, were used to analyze mean change from baseline scores for the Digit Symbol Substitution Test (DSST), Trail Making Test A/B (TMT-A/B), Stroop, and Perceived Deficits Questionnaire (PDQ). FOCUS, conducted from December 2011 through May 2013, included adult patients with recurrent MDD according to DSM-IV-TR criteria. Change in depression severity (Montgomery-Asberg Depression Rating Scale [MADRS] total score) was analyzed using data from 3 additional short-term placebo-controlled studies (2 of which included duloxetine) and 1 relapse prevention study. Analyses were done according to patients' working status at baseline and workplace position. All analyses were made versus placebo.
Results:In FOCUS, the effect versus placebo on the DSST was 5.6 for 10 mg and 5.0 for 20 mg (P < .001 for both doses) in working patients; the effect was 4.0 (P < .001 for both doses) in total study population. The effect remained significant when adjusting for change in MADRS. In patients with "professional" positions, the effect was 9.2 for 10 mg (P = .006) and 9.0 for 20 mg (P = .001). A similar pattern of results was also observed for TMT-A/B, Stroop, PDQ, and MADRS total score. The efficacy of duloxetine was not different in working patients (MADRS).
Conclusions:The beneficial effects of vortioxetine on objective and subjective measures of cognitive functioning are greater in working patients with MDD; the observed benefits were independent of improvement in depressive symptoms. 6 Evidence indicates that among adults with MDD, cognitive symptoms account for more variability in workplace performance than does total depressive symptom severity. 7 These observations support research underscoring the notion that cognitive dysfunction is a critical mediator of role impairment in MDD.
8Results from 2 double-blind, randomized, placebo-controlled studies demonstrated a clinical benefit of vortioxetine on cognitive functioning in adults with MDD, including objective neuropsychological tests of executive functioning, speed of processing, verbal learning, and memory.9-11 These studies confirm and extend the results from an earlier double-blind, randomized, placebo-controlled, duloxetine-referenced study with vortioxetine in elderly (≥ 65 years) patients with MDD.
12The beneficial effect observed on measures of cognitive functioning with vortioxetine is of particular importance for individuals with MDD who are working and/or engaged in activities that place high demands on cognition (eg, educational pursuit). Because depression is primarily a disorder affecting people of working age, 13 it is important to understand how the effect of vortioxetine on cognit...